Korea University researchers develop antibacterial gel for orthopedic implants

A research team led by professors from Korea University Anam Hospital and the Korea University College of Medicine has developed an antibacterial hydrogel designed to prevent infections in orthopedic implants. The gel utilizes Polyhexamethylene Biguanide (PHMB) combined with temperature-responsive polymers.

Unlike previous methods that required altering the manufacturing process of implants, this hydrogel can be applied directly to existing metal plates or screws during surgery. The gel is designed to increase in viscosity at body temperature, allowing it to adhere stably to metal surfaces. This creates both a chemical antibacterial effect and a physical barrier that prevents bacteria from attaching and forming biofilms.

In laboratory tests using Staphylococcus aureus and Pseudomonas aeruginosa, the coating significantly reduced bacterial growth and biofilm formation on titanium surfaces. Animal studies using rabbit femoral fracture models also demonstrated that the gel suppressed infection and improved bone healing and tissue maturation compared to untreated infected groups. The study was published in the journal ‘Advanced Healthcare Materials’.